<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket客户端</title>
</head>
<body>
<script type="text/javascript">
    // 需要浏览器支持WebSocket
    var socket;
    if(window.WebSocket){
      socket = new WebSocket("ws://localhost:8899/ws");

      socket.onmessage = function(event){
        var ta = document.getElementById("responseText");
        ta.value = ta.value + "\n" + event.data;
      }

      socket.onopen = function(event){
        var ta = document.getElementById("responseText");
        ta.value = "连接开启！";
      }

      socket.onclose = function (event){
        var ta = document.getElementById("responseText");
        ta.value = ta.value + "\t" + "连接关闭！";
      }

    }else{
      alert("浏览器不支持WebSocket！");
    }

    function send(message){
      if(!window.WebSocket){
        return;
      }
      if(socket.readyState == WebSocket.OPEN){
        socket.send(message);
      }else{
        alert("连接尚未开启！");
      }

    }

</script>


  <form onsubmit="return false;">

    <textarea name="message" style="width:400px;height: 200px"></textarea>

    <input type="button" value="发送数据" onclick="send(this.form.message.value)">

    <h3>服务端输出：</h3>

    <textarea id="responseText" style="width: 400px;height: 300px"></textarea>

    <input type="button" onclick="javascript: document.getElementById('responseText').value=''" value="清空内容">

  </form>

</body>
</html>
